Move rendering/svg/RenderSVGResource* to layout/svg.

Source/core/rendering/svg/RenderSVGResourceMasker.cpp

-/*
- * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
-#include "config.h"
-#include "core/rendering/svg/RenderSVGResourceMasker.h"
-
-#include "core/dom/ElementTraversal.h"
-#include "core/layout/svg/SVGLayoutSupport.h"
-#include "core/paint/SVGPaintContext.h"
-#include "core/svg/SVGElement.h"
-#include "platform/graphics/GraphicsContextStateSaver.h"
-#include "platform/transforms/AffineTransform.h"
-#include "third_party/skia/include/core/SkPicture.h"
-
-namespace blink {
-
-RenderSVGResourceMasker::RenderSVGResourceMasker(SVGMaskElement* node)
-    : RenderSVGResourceContainer(node)
-{
-}
-
-RenderSVGResourceMasker::~RenderSVGResourceMasker()
-{
-}
-
-void RenderSVGResourceMasker::removeAllClientsFromCache(bool markForInvalidation)
-{
-    m_maskContentPicture.clear();
-    m_maskContentBoundaries = FloatRect();
-    markAllClientsForInvalidation(markForInvalidation ? LayoutAndBoundariesInvalidation : ParentOnlyInvalidation);
-}
-
-void RenderSVGResourceMasker::removeClientFromCache(LayoutObject* client, bool markForInvalidation)
-{
-    ASSERT(client);
-    markClientForInvalidation(client, markForInvalidation ? BoundariesInvalidation : ParentOnlyInvalidation);
-}
-
-bool RenderSVGResourceMasker::prepareEffect(LayoutObject* object, GraphicsContext* context)
-{
-    ASSERT(object);
-    ASSERT(context);
-    ASSERT(style());
-    ASSERT_WITH_SECURITY_IMPLICATION(!needsLayout());
-
-    clearInvalidationMask();
-
-    FloatRect paintInvalidationRect = object->paintInvalidationRectInLocalCoordinates();
-    if (paintInvalidationRect.isEmpty() || !element()->hasChildren())
-        return false;
-
-    // Content layer start.
-    context->beginTransparencyLayer(1, &paintInvalidationRect);
-
-    return true;
-}
-
-void RenderSVGResourceMasker::finishEffect(LayoutObject* object, GraphicsContext* context)
-{
-    ASSERT(object);
-    ASSERT(context);
-    ASSERT(style());
-    ASSERT_WITH_SECURITY_IMPLICATION(!needsLayout());
-
-    FloatRect paintInvalidationRect = object->paintInvalidationRectInLocalCoordinates();
-
-    const SVGLayoutStyle& svgStyle = style()->svgStyle();
-    ColorFilter maskLayerFilter = svgStyle.maskType() == MT_LUMINANCE
-        ? ColorFilterLuminanceToAlpha : ColorFilterNone;
-    ColorFilter maskContentFilter = svgStyle.colorInterpolation() == CI_LINEARRGB
-        ? ColorFilterSRGBToLinearRGB : ColorFilterNone;
-
-    // Mask layer start.
-    context->beginLayer(1, SkXfermode::kDstIn_Mode, &paintInvalidationRect, maskLayerFilter);
-    {
-        // Draw the mask with color conversion (when needed).
-        GraphicsContextStateSaver maskContentSaver(*context);
-        context->setColorFilter(maskContentFilter);
-
-        drawMaskForRenderer(context, object->objectBoundingBox());
-    }
-
-    // Transfer mask layer -> content layer (DstIn)
-    context->endLayer();
-    // Transfer content layer -> backdrop (SrcOver)
-    context->endLayer();
-}
-
-void RenderSVGResourceMasker::drawMaskForRenderer(GraphicsContext* context, const FloatRect& targetBoundingBox)
-{
-    ASSERT(context);
-
-    AffineTransform contentTransformation;
-    SVGUnitTypes::SVGUnitType contentUnits = toSVGMaskElement(element())->maskContentUnits()->currentValue()->enumValue();
-    if (contentUnits == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
-        contentTransformation.translate(targetBoundingBox.x(), targetBoundingBox.y());
-        contentTransformation.scaleNonUniform(targetBoundingBox.width(), targetBoundingBox.height());
-        context->concatCTM(contentTransformation);
-    }
-
-    if (!m_maskContentPicture) {
-        SubtreeContentTransformScope contentTransformScope(contentTransformation);
-        createPicture(context);
-    }
-
-    context->drawPicture(m_maskContentPicture.get());
-}
-
-void RenderSVGResourceMasker::createPicture(GraphicsContext* context)
-{
-    ASSERT(context);
-
-    // Using strokeBoundingBox (instead of paintInvalidationRectInLocalCoordinates) to avoid the intersection
-    // with local clips/mask, which may yield incorrect results when mixing objectBoundingBox and
-    // userSpaceOnUse units (http://crbug.com/294900).
-    FloatRect bounds = strokeBoundingBox();
-    context->beginRecording(bounds);
-    for (SVGElement* childElement = Traversal<SVGElement>::firstChild(*element()); childElement; childElement = Traversal<SVGElement>::nextSibling(*childElement)) {
-        LayoutObject* renderer = childElement->renderer();
-        if (!renderer)
-            continue;
-        const LayoutStyle* style = renderer->style();
-        if (!style || style->display() == NONE || style->visibility() != VISIBLE)
-            continue;
-
-        SVGPaintContext::paintSubtree(context, renderer);
-    }
-    m_maskContentPicture = context->endRecording();
-}
-
-void RenderSVGResourceMasker::calculateMaskContentPaintInvalidationRect()
-{
-    for (SVGElement* childElement = Traversal<SVGElement>::firstChild(*element()); childElement; childElement = Traversal<SVGElement>::nextSibling(*childElement)) {
-        LayoutObject* renderer = childElement->renderer();
-        if (!renderer)
-            continue;
-        const LayoutStyle* style = renderer->style();
-        if (!style || style->display() == NONE || style->visibility() != VISIBLE)
-             continue;
-        m_maskContentBoundaries.unite(renderer->localToParentTransform().mapRect(renderer->paintInvalidationRectInLocalCoordinates()));
-    }
-}
-
-FloatRect RenderSVGResourceMasker::resourceBoundingBox(const LayoutObject* object)
-{
-    SVGMaskElement* maskElement = toSVGMaskElement(element());
-    ASSERT(maskElement);
-
-    FloatRect objectBoundingBox = object->objectBoundingBox();
-    FloatRect maskBoundaries = SVGLengthContext::resolveRectangle<SVGMaskElement>(maskElement, maskElement->maskUnits()->currentValue()->enumValue(), objectBoundingBox);
-
-    // Resource was not layouted yet. Give back clipping rect of the mask.
-    if (selfNeedsLayout())
-        return maskBoundaries;
-
-    if (m_maskContentBoundaries.isEmpty())
-        calculateMaskContentPaintInvalidationRect();
-
-    FloatRect maskRect = m_maskContentBoundaries;
-    if (maskElement->maskContentUnits()->currentValue()->value() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
-        AffineTransform transform;
-        transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
-        transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
-        maskRect = transform.mapRect(maskRect);
-    }
-
-    maskRect.intersect(maskBoundaries);
-    return maskRect;
-}
-
-}